Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
dot1x control-direction
dot1x control-direction
To enable unidirectional port control on a per-port basis on a switch, use the dot1x control-direction
command. Use the no form of this command to disable unidirectional port control.
dot1x control-direction [in | both]
no dot1x control-direction
Syntax Description
Defaults Both in-bound and out-bound traffic will be controlled.
Command Modes Interface configuration mode
Command History
Usage Guidelines You can manage remote systems using unidirectional control. Unidirectional control enables you to turn
on systems remotely using a specific Ethernet packet, known as a magic packet.
Using unidirectional control enables you to remotely manage systems using 802.1X ports. In the past,
the port became unauthorized after the systems was turned off. In this state, the port only allowed the
receipt and transmission of EAPoL packets. Therefore, there was no way for the unidirectional control
magic packet to reach the host and without being turned on there was no way for the system to
authenticate and open the port.
Examples This example shows how to enable unidirectional control on incoming packets:
Switch(config-if)# dot1x control-direction in
Switch(config-if)#
Related Commands
in (Optional) Specifies controlling in-bound traffic on a port.
both (Optional) Specifies controlling both in-bound and out-bound traffic on a
port.
Release Modification
12.2(31)SG Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
show dot1x Displays dot1x information.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E